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mc2255

  1. H

    MC-2255 power on pops

    I thought I would repost this old thread: AKthread as my last question was never answered. My MC-2255 has minor power on pops, both channels, speakers and headphones. The point of the LDR's (and relays in older models) was for protection and to mute during power on pops. Is this indicative of...
  2. J

    Should I change the main filter cap of MC2255 if capacitance below 20% tolerance but ERS is good?

    MC2255 amp two main filter capacitor is originally rated 38,000uf and current measurement of these capacitors are 28,000uf and 29,000 uf which are below 20% tolerance. ESR value is 71 milliohms. I was told that the capacitance value is not the only factor to replace these capacitors but also...
    • jervz
    • Thread
    • main filter capacitors mc2255 recap and restoration
    • Replies: 0
    • Forum: McIntosh Audio
  3. J

    MC2255 Power Guard start up stop at sequence 5 with a long beep.

    Hi, My MC2255 stops during the power on start up due to a long beep with sequence “5” (- Reg Low) in the display. It started to be an intermittent issue yesterday but it consistently encounter the issue today and I can’t proceed to listen to music due to an issue on this unique self test...
    • jervz
    • Thread
    • -reg low mc2255 power guard sequence 5 startup
    • Replies: 18
    • Forum: McIntosh Audio
  4. J

    MC2255 main capacitor

    I understand that the main capacitors of a MC225 amp usually last. The two big capacitors at the back were measured and capacitance are 28.5k uf and 29k uf. May I know if these values are outside the tolerance or out specs and needs to be replaced? Appreciate your feedback.
  5. J

    MC 2255 & C29 service maintenance or component upgrades

    I'm taking my 2255 amp & C29 pre-amp for service and cleaning to our local technician in our area as the potentiometers are scratchy and sometimes the left channel gets distorted intermittently. Our local technician has done LED upgrades, DC offset, bias adjustments, power meter...
    • jervz
    • Thread
    • bias adjustement c29 led conversion maintenance mc2255 mcintonsh recap restoration vintage amp vintage preamp
    • Replies: 16
    • Forum: McIntosh Audio
  6. J

    McIntosh MC2255 amp and C29 pre amp - advice needed

    Hello, I'm interested in the value of a McIntosh MC 2255 amp and C29 preamp based on original single owner owns but I don't know if US$3500 or C$4500 (excluding shipping) is a good evaluation for this pair. Both of the units are working condition and still in factory condition. I'm not sure if...
    • jervz
    • Thread
    • c29 mc2255 mcintosh mcintosh c29 mcintosh mc2255
    • Replies: 30
    • Forum: Dollars and Sense
  7. cardoctordav

    Found an exact replacement for the LDR in Mc2255 and other Mac's

    The original LDR in my MC2255 is part number CLM6500. This part has been discontinued by the manufacturer. Digikey has an EXACT replacement! Part number NSL28. All of the specifications match the data sheet 100%!
  8. edwinh

    MC2255 speaker on/off switch just spins

    After my 8 year old got tired of listening to classical music at a moderate volume, he decided to turn off the speakers. Well, now the switch turns and the speakers are off. I know that these switches aren't made anymore but before I pull the amp out of its case and start taking it apart, are...
  9. C

    ‘Vintage’ Mcintosh SS amp to go with C29 preamp and AR3 speakers

    Hi all, I recently purchased a C29 preamp and so find myself able to venture into the McIntosh section of audiokarma for the first time looking for a bit of advice. Having recently restored a pair of AR3 speakers I now have a second room set up of a Thorens TD160mkii table, Topping D90 DAC...
    • Cropper
    • Thread
    • ar3 c29 mc2155 mc2205 mc2255 mc7270 mc7300 mcintosh
    • Replies: 33
    • Forum: McIntosh Audio
  10. H

    MC2255 click at startup through speakers

    Hi, I have a nicely operating mc2255 which has a very small click (through the speakers) right at the start of power up, before the check sequence is completed. I am wondering if this is normal, or what might component might be failing if this is not normal? Can any other mc2255 owners confirm...
  11. Pat59

    I bought an MC2255 with the front glass disassembled

    Hello everyone, I managed to finally purchase the amp I’ve wanted for many years, a MC2255 - the catch is that someone else took it apart to replace the lamps, and decided it was too much of a job for them. Well, I got it at a good price and I’m trying to piece it together and I’ve never seen or...
  12. C

    What is it worth? C34V preamp, MC2255 amp, MCD 7000 CD player

    I have met a guy with this system for sale. I am not familiar with any of these so I could use your advice. Pros and Cons and estimated value of each would be appreciated. I have not heard them, but they look clean and well taken care of. Thanks,
  13. H

    Adjust MC2255 channel gain question

    Hi, I have been fine-tuning my very nice mc2255 amp. I have found that the gain on one channel is slightly higher (6%) than the other channel with both gain knobs set to max. I have cleaned both pots, but no change. I was thinking of adding a small resistor in series to the louder channel, but...
  14. J

    New Vintage Mcintosh Gear

    I recently bought 3 units in mint cosmetic condition 10/10 and in fully functional condition. These are the c33, mc2255, and the mr80 tuner. Can someone give me some information on these units? I've read a little about the c33 and how it's a great pre but there's barely anything on mc2255s. I...
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